Precision-machined from C630 Compatible with no-lead fuel and accept any type of valve-stem material Provide maximum service with chromed valve stems Feature a tapered nose design for maximum bearing service and minimal port obstruction; improves flow characteristics 2.02" overall length, .560" top diameter, accept OEM-style top hat valve seals (sold separately) Accept OEM lower collar Overall length is 2.40ö OEM style Machined for std. .420ö seal and can be used as an intake or exhaust guide Made in the U.S.A.. GUIDE VLV M8 IN MB+0.002
